SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f437729270641f8445f2d000bbb9b2c255bf5a3d491cb6c2461f9e4ca106ed65' 
  AND token = '7FgW3OwuF4PukvaqumzU7p/3Rl8P+YVnWpudGljbGtI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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