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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '705341a920096d219ffd2d47a05c3a0dff71d97386846cc843349edeb3827fb9' 
  AND token = 'cg/3GMZi7kuOoEEXVjHsZ7d60HRc7TdWxBTfnZbxXf0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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