Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20664614ba39c1869bd596dc15b9dbf32215eccb67ee46ad601593004407491e' 
  AND token = 'AlRRD8Je4EZUwRzTvRBy0mK3HQfrumaECJLPnJnF/j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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