Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '115771d2c75207195a2526816215859c44abea10125a01296244c7404fee7848' 
  AND token = 'h3fxP1sGMQHEH8Fc3wR+pZgtM/qDOjHB4BH5kP5eSZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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