Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5b81741025ee0ba6559519087e2fa230add42198fb1b1a88dc62bba06b841d39' 
  AND token = 'qcGFxRKo4f87+d5+xP5WR6DP0NwKIyiVUWtQ+BQOsjQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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