SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '69c344c26570b9ffefc884fb7e661378bab95163712e9f45da4913cfe2b18b4d' 
  AND token = 'rvquAqBhm1z155Rf/gqIGFWCoFxVOpaqrYuiQ5cNzLk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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