Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65ae849d63990d5cf976455a7a6693bd276d086e6806611e286d3cca71fecaa4' 
  AND token = 'wuVZMTdtn2rM+F+yAVOIv4ejJ/tWTxfSwg0h0+nOvu0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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