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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0203af377c0d71e8bced59cd168d8d02a99603785611ff702da6b4ea2576e617' 
  AND token = '1jmutOiQcjHVWrZeAYWDeF7cC3n76DcKg15Kd3jeypw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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