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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '3a77e831078c032031bea1a3e89fa63dfed4f94227e34228e133bb9b87dc7575' 
  AND token = 'U1jdZS6Z0OXUgrH2R5+5gleyzcONlU6p+cWj8i11ljY=' 
  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"
    }
  }
}