Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9541bdb7462de6d1ca71784d3e148846eb1abbe28c0618bb7ecba001b4afa48c' 
  AND token = 'H/UsJys1kj+nrMTMfYIBeqMsPEADmsCcoXVvOjREw3g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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