Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '355b9ca4fa90f72ebb6571cfeb2ebb629fe1bf7add4b7bffe77ef48be85bcdc1' 
  AND token = 'SBQYFc9eyNTVXyg5UArvST4xhbgNRO1QM9SVSRslyOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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