Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bd9032b56e7de4f0f1096dc7c1ca16b5b14bdf1638b6f44b0e56ed48c1287246' 
  AND token = 'lKx1O8iC5JubzeSdTdxfhjQ8LshSJJezWDXSFgjXHns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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