Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '247bf7c33de7b07ea0a182b2f847cd496796d5c865cbe03054075c6064b371cb' 
  AND token = '2fDvjHTzTwqHp59fLKhNCr3zQ1mjgOC32RmNpf1DHzo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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