Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '97fdaad1876808483fb4fab86f978f91a0dc2e6ab249c6bf1c5d168c837a597f' 
  AND token = 'hbUPCR2fTrlWEBkaIJ+qmLKaVA+wxcnPoQH8eA2IhAc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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