Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a98cdf0a88f91264da125a76500b1e9a0fab24158b0b2dff624b2bbfbde87a2' 
  AND token = 'VtTIsqjCNhtX/GL2OrelwFZV6s8csE9j9o8/ksgJ+0A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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