Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a632fd551968b7c1f3c7a08cf8f2ab244f1b6caa823b4c99cb3c81e1d2c47fa1' 
  AND token = '4wngcYi0LO9nbG/79zMLPdAs30B9lEI43gBQmZ5sWLA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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