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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '54474b2335b29c1c9df8666fba4005a288335bb25bad406018313ee7c7314ddb' 
  AND token = 'L+POdNooKlmhmFF7JSjBd+WDc6o8Q3Sfmg6EDKPKKXQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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