Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ffa89783bf8a01d4375f30232652e102cb0be60cb9f5a5a9355475852a55358' 
  AND token = '0l/dmFCzdwqT/QNSVTTaLgbFTutJ+XwrwHCeF66sbIo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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