Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b274af5eff0ba0030e2e006b1f0a59d31e88b7bf6696b88a6d9ba7b13ad4761b' 
  AND token = 'Wi2K5wf00/+YvUqDakBU3/d7M0HTvq8AJTit1TmN7ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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