Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '742d2b3d3e9c9b8873dc0ebc65715b2cd1b7c2356020585e20b38b1f20322dcf' 
  AND token = 'yMyyvVBi/BDSukRepTvXYOKHwYIwIXD76y2S3ky2Vuc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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