SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3f2d930747b0ca16ece2442c5d6407b086f815cb28c8c0d5973fa54f77434044' 
  AND token = 'fVJ42nCK7Tt7yxU7qJw2wcfYkWk5kBV76/gmZj0IypA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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