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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '118f9a8c3b8e8f6347a2d1642112830691fd64973d54242f059c0303dd3374d9' 
  AND token = 'hOO2bjAJerIVdpUx7C5OSKCPlJPlhaiPuozN28f0Ch0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00091

JSON explain

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