Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d5fa2bc25faacb694bc1253c67f878c538acca4a41512afc295f56140ab7826' 
  AND token = 'uxV/wY8S55WZGy23cUiL83NJu8F5LSUdNoSOyfK4HEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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