Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32c1de8222c817dabcd6ed9a6bb60f5e3d188139209cf675214acd308d5180c8' 
  AND token = 'ej256QOgrZy+Wm9TF4SkhwGllQ3JZ8qfFConiM2DC6M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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