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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd9285f69089965578bf1e45ab3ccceaa62187ec7859eb9db6f43ab8496079737' 
  AND token = 'WEDuT4eV7XRP3aesYL8Bi1Yxw9aAYcoeS3Lgeh2bwSM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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