Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08c12c1b8c8c86cbd8ad03d1e18d000caef1a7cc9855c739bad5824a1c2481ee' 
  AND token = 'hlEQynI2QO3VqfgsJFhNXynkKxdEUpGl2Qatq6w7yc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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