Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6615f8b6ee30f976de63b1c3aad39425d0f1f3c3d41d537894b6967f4f2da4c9' 
  AND token = 'Vlr8HeRhXl6M5MahokWnU2hs5JhKJIvDELpAQSprRVE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}