Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95bb109d490cf85b0c260a2c7c6c65dac2e19c3e7f3aac81e5717978e18a4663' 
  AND token = 'QqxLwbpGbWpqwiMXSR9ykSN5OPKTXJ+B+4meiIMyL0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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