Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7b2f673e61166b8c79292dada6ef1d08a0deb92516566ba8f2b88ed09631174c' 
  AND token = 'kpXPsFlI+4NIHyBs5d2SesM7DDvCNqYmL2fZXh7/ubo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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