Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '87ba72e477a9b6f82f358a83826cb0fa5f1e2ec0af26b583a13432136c078d8d' 
  AND token = 'bvv144CbpFG5vR4ciL+nzso0Y52GpLGRswhg742lInE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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