Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cf8dc007cd41bfd482dd573aa08a1cea722ad3484b7315381c38b33e9d6282a' 
  AND token = 'sq36w6Y86vlb0U7QBRFfsgv574ANgfd5h8nNHFu2sDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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