Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ad55ce1e28011282a50efe991682021b21d2a1695b02b83a2e4de18af4abd57e' 
  AND token = 'uD4gbrsLn0hOBnQXaOJYNW5uP1gRdInR2R/Jj2DxqQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}