Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '172075355a2106c1b9cce98fb452f04227cd8d1a4036ce421598c21a24057b3a' 
  AND token = 'rIwg7WgYJytpB8pGJkSyoIncXxll+uaqiSidhBlTZZE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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