Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'efb21661ecc043f1f07505c05c3587e7c14b5a251260fc0a4b9f8fbbf74a71b7' 
  AND token = 'jjNi4LJOIxpze/cWY2rHcEl9CfB8lhpuGAIjONLAgvA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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