Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00b2ef4d8910e5aa06a659d49192df8e868e992fab43d78a7b7bdde5a06444b1' 
  AND token = 'IJP4up6+GXwi1ceqYxmM6czCfZ8xan9bll6q/U/QmdY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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