Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '83da38a0ce80d5efd1e183ab399db71d5add5d4fa3547d0413d848233dfab4fe' 
  AND token = 'TT3/gJjCU6bzvjNBD6chLn2bkD4dHjrKY39Qj8UKrNI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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