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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2406fedc1489452338c812bbe0d6f828c1e190a769440f7dafd82e9d56454000' 
  AND token = 'co3D0Z0TnjpIrFEO17QOtBZorfhS+XtMd5ByzfW9mYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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