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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '359c085dd5a500d8422514c923ec46fbf39074454f7663c327e13b85e012c209' 
  AND token = 'XWyO0ffBwLeQJfWyGrq5dqZgkX4yo92cwXOFA6wu0wU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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