Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '854718453c2b6cb13383d040ffd9cf26b3f30de6a800cb3521e4abe794b5a2c1' 
  AND token = '3tptNSzP96ukdoJFsma36ZvpoYKKNBOvJ+mbSoingi4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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