Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48ed383064314dc0172732c168bfce2b401e7616a752b1167883e0946aa7d787' 
  AND token = 'SBomwijAkIrKg/aM14L447TYH6MhkIs42l3uZypVyZ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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