Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '566929c4a5d8a9d069d576f8c173f14ecf660ad840635c37e136994a0aaf9413' 
  AND token = 'x2ijMGam+uigVsHlS2/6ZJrvMWTI3eOhPk3IXiQYHts=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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