Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0975b70cac017c0ce2841ec8e6b1104179f3652e50b54bf737a1091ccb6a380b' 
  AND token = 'A4raeFue4es7Bo6jyb9W81OAabkwwrvJGmQRnFXrNSc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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