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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd8aaa51ec542bfc1d59eb572eb6680320aa1f771842236985edd892c401be8ce' 
  AND token = 'tO5DWd8YNR+eePasiGC6v1G7VZlepO2hO0bnxoOC2PE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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