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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '10a437d1a2b38d6ddf158a6fd1a983368408b867c751620fbdc718a155bb9b74' 
  AND token = 'aYj/SdPDShGUN/rAW2RYBQTB3aXWzCHhkUef2a3pNlM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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