Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '563b3ceaad85ef43e621d90511cbca09a0d740059f103abb8d243c48159e2f19' 
  AND token = 'AS/cpRtqb7sXNez5vMGTxB4/1fiW3B2I/YjRKtsmRfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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