Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ee26674866dbbe370da073b0cb89867aee47365da41f11730876a9b5fdefd25' 
  AND token = 'EpHYRalppkow5YCmST+gavfTuD0pxOOdpnGjL9BkSl8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}