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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f131b6210536e3b92364bf0abc9b9820c1707294543b7dfeac23fa8b4805223' 
  AND token = '0BeI46/N2X0VdS81OJRCCSev5fKqXXFRaGL+hRSLXFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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