Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '83f6ea4524b8c7a834bcc7b933a4a11d47e5549b2bd08e516125f4db9e6056de' 
  AND token = 'Q8pdatlxNqoCN4OZK+2Hpa9a3SHkcdYkLoE3Hv2Mh58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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