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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1507840ce03032059f3be2b5bb771536b5d2022ab134c500caa6b3d3ea26678' 
  AND token = 'woZf/OKMTKFOkY782WXhag8TpanKYrSO7OJYiiko7Lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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