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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2579ff59e216e5b59e21e1b6ae1ae7aac4a553ae3ac82a5313022a345881352a' 
  AND token = 'QVw6Fjf/w5zZtI7dOHMj0jwTccPpUmTkbDWDecwybEk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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