Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14490f81d960ccff2efe5efb6e8ec0e3e5e04c51976c3700d42eea2008e7186e' 
  AND token = '1hW3qQigI5SXwuUHFJf33769vHHUDP+p1ierAmA48tg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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