Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '17f93ef871fbf0e632f0a4f7944e73d0c336b5693261de4115ac85e06a2c3329' 
  AND token = 'mkB4cIwAP7jHfW3eWcirgAAxsh/4DftbUC+kGgdwick=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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