Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a28c4f91b878c990103855d422aaaa43f25da3331299db3fa0b2ee5c904af027' 
  AND token = 'FI6i0/CMkvtnUbw/mo4AQX6Ij566GsJcbsIzxxyw6WM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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