Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db41230a1b7a53ed63aa8121da931c1bd144e710fd9a0f13e103b183370d200c' 
  AND token = '0gBjPn2PFLLc7CIcNApRY/KWX9qRWpJ5kYp5zyiP0SY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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