Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '082cc8e468d722f636aebafea16383ef4fce291b4d1aceddcd26242c64d11bbc' 
  AND token = 'NuA3K2P7ZXbhZngLHgn9waUv5arXmZaEXha6lVY5oGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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