Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '155ef60b83271ffff29eae954e338e38e46fe02f61911975a23ab503e9b6634d' 
  AND token = 'DW5zPfKwL2122TRun2Og3YFnZ2lU7WORUJVSZKd0Fyg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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