Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'f231ee2315ea2a44da12ee95dfddb7d365d5a06cbff23ba1720bdcea2a644222' 
  AND token = 'TubDAoZGsojGyJwqdaosj3F22CclYvseNHyO/GGhQp4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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