Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fecc3cf288abd90e5469f8c3acd3323b1dfbdd408b874be76fae27d67044c8d' 
  AND token = 'QMDK2jxXqjOL/jz7cwS+QE7EQEkjjv6jgBJTUyt25hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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