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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '314d6121100b0451787570945b52042078f0db82349225054064a4e77aea4941' 
  AND token = 'jb/j09AuXWm7RZt+OIlDj0PGZOdH9kR3+au7fZJWyWc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}